Question 10 (part 2) · LEK · Multiple pregnancy

For a monochorionic-diamniotic pregnancy to develop a fertilized egg cell must divide:

  1. A. 24 hours after fertilization
  2. B. 1-2 days after fertilization.
  3. C. 3 days after fertilization.
  4. D. 4-7 days after fertilization.
  5. E. more than 7 days after fertilization.
Hint

The later a monozygotic embryo splits, the more membranes the twins share; which structure has already formed at the blastocyst stage?

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